dnsmasq: Denial of Service and DNS spoofing
1.
Gentoo Linux Security Advisory
Version Information
| Advisory Reference |
GLSA 200809-02 / dnsmasq |
| Release Date |
September 04, 2008 |
| Latest Revision |
September 04, 2008: 01 |
| Impact |
normal |
| Exploitable |
remote |
| Package |
Vulnerable versions |
Unaffected versions |
Architecture(s) |
| net-dns/dnsmasq |
<
2.45 |
>=
2.45 |
All supported architectures
|
Related bugreports:
#231282, #232523
Synopsis
Two vulnerabilities in dnsmasq might allow for a Denial of Service or
spoofing of DNS replies.
2.
Impact Information
Background
Dnsmasq is a lightweight and easily-configurable DNS forwarder and DHCP
server.
Description
-
Dan Kaminsky of IOActive reported that dnsmasq does not randomize UDP
source ports when forwarding DNS queries to a recursing DNS server
(CVE-2008-1447).
-
Carlos Carvalho reported that dnsmasq in the 2.43 version does not
properly handle clients sending inform or renewal queries for unknown
DHCP leases, leading to a crash (CVE-2008-3350).
Impact
A remote attacker could send spoofed DNS response traffic to dnsmasq,
possibly involving generating queries via multiple vectors, and spoof
DNS replies, which could e.g. lead to the redirection of web or mail
traffic to malicious sites. Furthermore, an attacker could generate
invalid DHCP traffic and cause a Denial of Service.
3.
Resolution Information
Workaround
There is no known workaround at this time.
Resolution
All dnsmasq users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/dnsmasq-2.45"
|
4.
References
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